you should will need to add a field with dates and time the game was added and then the sql part would be ".......ORDER BY date ASC". Or if you have IDs setup working correctly sort by IDs (which I wouldn't recommend).
You would need a field which holds the date of the game, then you would "ORDER BY date ASC" on the SQL query. It's not that hard, but you would also have to update the script that puts the games into the database to include the date.